Due to the distortion of the predictive frame, which is caused by warped from the previous reconstructed frame, it will generate high-frequency residual regions.
Thus, the compression of high-frequency regions is difficult for a residual compression network.
Therefore, if the codec does not increase the bitstream for the residual, the error will propagate to the subsequent frames, and PSNR values will drop continuously with the increasing time steps.
If increasing the bitstream continuously, the RD performance will degrade and the rate control will lose efficacy.
Although inserting high-quality frames in traditional video compression and utilizing the error propagation aware strategy in learned video compression [1]} help to alleviate the distortion, the error propagation cannot be completely evitable for the motion-based video compression framework.
Instead, the proposed motion-free video compression framework maintains the same quality level along with the frames (i.e., Proposed in Fig. REF ), and the new framework will be explained in the next subsection.
